Manual pressure activated application mechanism
First Claim
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1. A skin insertion mechanism of a needle fixedly positioned in a needle holder and the skin insertion mechanism having a connector to an injection or analysis system, comprising:
- a) a skin attachment plate coated with an adhesive layer for attachment to a patient'"'"'s skin and having a hole allowing the passage of the needle;
b) a spacer mechanism connected to and guiding an axial movement of the needle holder and the skin attachment plate relative to each other, the spacer mechanism comprisinga withholder structure releasably connected to the needle holder and the skin attachment plate and keeping the needle holder and the skin attachment plate in a ready-to-use position axially fixedly spaced away from each other to cover the needle, and the withholder structure axially moving in a direction relative to the needle holder when released, anda coupling element keeping the needle holder and the withholder structure in the axial position by releasable connecting elements requiring a pre-set trigger point pressure to be released, and the coupling element axially moving in a direction of the axial movement of the needle holder when released; and
c) a release element movably linked to the spacer mechanism and provided with pressure exerting elements producing pressure onto the connecting elements by axial movement towards the needle holder to release the withholder structure from the ready-to-use position, and allowing the axial movement of the needle holder towards the skin attachment plate with sufficient velocity to pierce the skin by the needle and inserting the needle into the skin.
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Abstract
A skin insertion mechanism includes a needle fixedly positioned in a needle holder with a connector (or connective means) to an injection or analysis system having a skin attachment plate coated with an adhesive layer and a spacer mechanism kept in the ready-to-use position, the skin attachment plate is spaced away from a needle support covering the needle. Subcutaneous insertion of the needle is effected by attachment of the adhesive layer to the skin and releasing the spacer mechanism by applying a pre-set trigger point pressure against the skin.
7 Citations
14 Claims
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1. A skin insertion mechanism of a needle fixedly positioned in a needle holder and the skin insertion mechanism having a connector to an injection or analysis system, comprising:
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a) a skin attachment plate coated with an adhesive layer for attachment to a patient'"'"'s skin and having a hole allowing the passage of the needle; b) a spacer mechanism connected to and guiding an axial movement of the needle holder and the skin attachment plate relative to each other, the spacer mechanism comprising a withholder structure releasably connected to the needle holder and the skin attachment plate and keeping the needle holder and the skin attachment plate in a ready-to-use position axially fixedly spaced away from each other to cover the needle, and the withholder structure axially moving in a direction relative to the needle holder when released, and a coupling element keeping the needle holder and the withholder structure in the axial position by releasable connecting elements requiring a pre-set trigger point pressure to be released, and the coupling element axially moving in a direction of the axial movement of the needle holder when released; and c) a release element movably linked to the spacer mechanism and provided with pressure exerting elements producing pressure onto the connecting elements by axial movement towards the needle holder to release the withholder structure from the ready-to-use position, and allowing the axial movement of the needle holder towards the skin attachment plate with sufficient velocity to pierce the skin by the needle and inserting the needle into the skin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification